This answer is not correct. Perhaps you thought that there was only 1 pi bond in the carbon-carbon triple bond and none in the nitro group. Remember that you can only place two electrons in any single small space such as an orbital or a sigma bond between two atoms. If you have a multiple bond, there is always a maximum of 1 sigma bond...the rest must be pi bonds. You should also draw out the electron-dot formula for the NO₂ group before selecting your next answer.